function gmarkerCreate(index, value) {
    var marker =  new google.maps.Marker({
        map: BIZ_MAP,
        position: new google.maps.LatLng(value.Xa, value.Ya),
        title: value.name,
        index: index     
    });
    return marker;
}
function gmarkerClear(gmarker) {    
    if (gmarker && gmarker.position) {
        gmarker.setMap(null);
    }
}
function gmarkerSetDefaultProperties(gmarker) {
    gmarker.animation = google.maps.Animation.DROP;
    gmarker.draggable = true;
}